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Finding the Fourth Proportional to 960.06, 1,322.55 and 664.83

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Solution

The fourth proportional to 960.06, 1,322.55 and 664.83 is: 915.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.06 : 1,322.55 = 664.83 : x
  2. Step 2: Convert to fraction form
    960.06/1,322.55 = 664.83/x
  3. Step 3: Cross multiply
    960.06x = 1,322.55 × 664.83
  4. Step 4: Simplify right side
    960.06x = 879,270.92
  5. Step 5: Solve for x
    x = 879,270.92/960.06
  6. Step 6: Final answer
    x = 915.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.